Swivel-plow



(ModeL) 2 Sheets-Sheet 1.

J. A. HOWE,De0 d. (E W HOWE, Admlmstratnx) SWIVEL PLOW.

Patented Oct. 31, 1882 Marlin J72 Fen/Z07:

1 fw. 5 m

Nv FEIERQ Pholo-Lilhngnphal', Wilhlngtnn. D. Cv

(ModeL) 2 Sheets-Sheet 2.

J. A. HOWE, Deod. (E. W. HOWE, Administratrix.)

SWIVEL PLOW.

No. 266,627. Patented Oct. 31, 1882.

giinw yw .jnfuenior.

grlpher, Washinglun, D. c.

' NITED STATES ATEN T FFICE.

ESTHER W. HOlVE, ADMINISTRATRIX OF JAMES A. HOWE, DECEASED, OF AYER,MASSACHUSETTS.

SWIVEL-PLOW.

SPECIFICATION forming part of Letters Patent No. 266,627, dated October31, 1882.

Application filed February 24, 1882.

To allwhom it may concern Beit known that JAMES A. HOWE, late acitizenof the United States, town of Ayer, county of Middlesex, and State ofMassachusetts, deceased, did invent a new and useful Improvement inSwivel-Flows, of which the following is a specification.

This invention relates to improvement in swivel-plows'to give such formto the moldboard as to disintegrate the soil more thoroughly, to give alonger bearing to the bottom of the plow, so as to cause it to run leveland firm in the furrow, and to turn the soil completely over; also, toconstruct a plow so that it will operate in stubble land having anadhesive soil without the mold-board becoming clogged and cause thefurrow to scour the entire mold-board and wear the share even on bothsides. To obtain this result the construction is illustrated in theaccompanying drawings, in which- Figure l is a perspective view of theplow, showing the various parts. Fig. 2 is a rear view of the plow. Fig.3 is a View of the detached mold-board. Fig. 4 is a view of the detachedshare. Fig. 5 is a view of the detached standard 0. Fig. 6 is a detachedpart of standard 0. Fig. 7 is a transverse section of the mold-board outthrough at the lines B and 0. Fig. 8 is a transverse section, showingthe form of the mold-board and share at the lines I J.

Similar letters refer to similar parts in all the views.

The mold-board A is constructed by a new and different formula, to wit:The mold-board at the rear is divided transversely into three equalparts, E F E. The parts E E are both constructed with a true are, andthe part F is constructed of twice the radius of the arcsE E. For amedium-sized plow the arcs E E are constructed of radii of three inches,and the center part is constructed of a radius of six inches, showninFig. 7,) and the radii of the diameters are increased until they formthe mold-board at line I J. At this point the increased width of themold-board is curved in an opposite direction of the arcs E E, and thesearcs I J are constructed of the same radii of arcs E E, as shown inFigs. 7 and 8. This form of the (ModeL) mold-board is extendedlongitudinally until it fits and connects with share B.

To the outward-curved sections of the moldboard I J, and at an angle ofabout thirty degrees to them, the supporting-shoes L L are attached orcast on. (Shown in Figs. 1 and 8.)

At the rear end of the mold-board A two supporting projections, M M, areconstructed to receive the brace-hook N. (Shown in Figs.

1 and 2.)

P P are the handles. K is the beam. It is the cutter; S, the gage-wheeland its supports. V is a pivot-brace. T is a forked pivoted brace, thatpivot-s the mold-board with standard 0, and is held in position bywroughtiron rod U, which connects the standard 0 with the detached part0 and the mold-board and share, the rod passing longitudinally throughthe standard 0 and pivoting very strongly all the parts together, andpermitting the plow to turn from right to left. The share, beam, andhandles are attached together inthe usual manner. The radii of thesearcs may be increased or diminished in proportion to the various sizedplows that may be desired to be constructed, and longitudinally curvedoutward with an arc of a radius of sixty-five inches.

Operation: When a plow of this construction is put to work and propelledby the team, the operator holding it in the right position, it entersthe ground easily, and. as the furrowslice is separated by the cutterand share it is raised and turned as it comes in contact with themold-board. Thclatter, being constructed 8 5 with arcs of various radii,gives such form that the soil is more completely disintegrated than itis when the mold-board is constructed with single arcs or constructedwith scroll form having straight lines from share to extremity ofmold-board. The mold-board of the plow, being constructed withadditional outward curves I J and shoes L, has additional width, thusholding the heel of the plow down into the furrow and on the shoe L, theshoe lengthening the bearing of the plow on the bottom of the furrow,which holds the plow level in the work and causes the point of the shareto wear sharp and even on both the upper and under side. The hook N ispivoted at V to the plow-brace. The two projections M M on themold-board are seats for the brace-hook N, which holds the mold-board inposition to work and turn a furrow either to the right "or left. Theirposition on the mold-board raises the hook above the turning furrows,and it is less likely to impede or clog with soil when the plow is beingused to turn a deep wide furrow.

I am aware that the mold-boards of swivelplows have been constructedwith one true are transversely, also with sections of a scroll.

I do not claim a mold-board so constructed, broadly; but

What I do claim as JAMES A. HoWEs invention, and desire to secure byLetters Patcut, is

l. The mold-board of a swivel-plow, having its rear end convex and itsfront portion made with a central convex arc and side concave arcs,arranged transversely and increasing in radius from rear to front,substantially as shown and described.

2. The mold-board A, having three transverse arcs, the central convexare being equal in radius to that of both the side concave arcs andconverging at the rear to form a convex mold-board at B C, substantiallyas shown and described.

3. The combination, with the mold-board A, having at its front end aseries of three arcs, arranged transversely to each other, of thesupporting-shoes L L, substantially as shown and described.

ESTHER WV. HOWE,

Administratrix. Witnesses:

LEVI SHERWIN, GEORGE EJ311111.

